MNT: Effectiveness of MNT for Obesity (2009)
What is the evidence to support effectiveness of MNT provided by a Registered Dietitian for overweight/obesity in otherwise healthy adults?
Medical nutrition therapy (MNT) provided by a Registered Dietitian results in both statistically and clinically significant weight loss in otherwise healthy overweight and obese adults. Four studies regarding the effectiveness of medical nutrition therapy for under six months reported significant weight losses of approximately one to two pounds per week. Four studies regarding the effectiveness of MNT from six to twelve months reported significant mean weight losses of up to 10% of body weight. Four studies report maintenance of this weight loss beyond one year. In these studies, both individual and group sessions were employed with weekly and monthly sessions.
- Grade I means there is Good/Strong evidence supporting the statement;
- Grade II is Fair;
- Grade III is Limited/Weak;
- Grade IV is Expert Opinion Only;
- Grade V is Not Assignable.
- Moderate (B) means we are moderately confident in the effect estimate;
- Low (C) means our confidence in the effect estimate is limited;
- Very Low (D) means we have very little confidence in the effect estimate.
- Ungraded means a grade is not assignable.
Evidence Summary: What is the evidence to support effectiveness of MNT by a Registered Dietitian for overweight/obesity in otherwise healthy adults?
- Quality Rating Summary
For a summary of the Quality Rating results, click here.
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- Raatz SK, Wimmer JK, Kwong CA and Shalamar DS. Intensive diet instruction by registered dietitians improves weight-loss success. J Am Diet Assoc. 2008; 108 (1): 110-113.
- Richardson CR, Brown BB, Foley S, Dial KS, Lowery JC. Feasibility of adding enhanced pedometer feedback to nutritional counseling for weight loss. J Med Internet Res. 2005; 7 (5): e56.
- Sacks FM, Bray GA, Carey VJ, Smith SR, Ryan DH, Anton SD, McManus K, Champagne CM, Bishop LM, Laranjo N, Leboff MS, Rood JC, de Jonge L, Greenway FL, Loria CM, Obarzanek E, Williamson DA. Comparison of weight-loss diets with different compositions of fat, protein, and carbohydrates. N Engl J Med. 2009; 360 (9): 859-873.
- Schneider R, Golzman B, Turkot S, Kogan J, Oren S. Effect of weight loss on blood pressure, arterial compliance, and insulin resistance in normotensive obese subjects. Am J Med Sci. 2005; 330(4): 157-160.
- Willaing I, Ladelund S, Jorgensen T, Simonsen T, Nielsen LM. Nutritional counselling in primary health care: a randomized comparison of an intervention by general practitioner or dietician. European Journal of Cardiovascular Prevention and Rehabilitation, 2004; 11: 513-520.
Search Plan and Results: Effectiveness of MNT for Overweight/Obesity in Adults 2009